2016 Chevy Cruze Flip Key - Sevice Theft Deterent System

Question

When trying to program Fortin with GMT-1 harness unit I get a "Service theft deturent system" message on dash displace as soon as I turn the key to run. I uninstalled everything and reflashed unit with newest software and set to Lock-Unlock-Lock reinstalled and same message. Car wont start with factory key with harness installed. please help

Answer 1

Make sure the red connector from the t-harness is properly inserted in the EVO module. Also make sure you did not connect the brown wire sticking out of the t-harness to the canbus, you must use the brown wire on the 5 pin connector.

Comments

Ive double checked all connections and yes im using the brown wire from the 5 pin connector.

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If you connect only the 6pin connector on the t-harness but leave the 3pin connector, does the vehicle start with key ?

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With just the 6 pin pluged in the car works like normal.

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Are you able to program the module to the vehicle as stated in the installation guide ?

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No. When the three pin connector is installed I get the "service theft deterant system" message on the display as soon as a key comes on. When I try to program I get to where the yellow led should flash 10x but it just stays solid.

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A continuity test must be performed using a digital multimeter on the 3 pins of the immobilizer connector of  the t-harness.

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what should I be looking for when I do the continuity test?

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You meter should show continuity when testing wires in the same pin positions from the male to female molex connectors of the t-harness. If one of the wires tests "open" then that is the cause of  your "no-start" issue.

 

Thank you,

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So with the harness in the car or out of the car?

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Out of the car please.

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okay harness out of the car

(3 pin connector to 3 pin connector)
pin 1 Male black to Female black - Continuity ok

pin 2 Male blue/black to Female Blue/Blak - continuity ok

pin 3 male white/red to female white green - continuity fail
 

3 pin to 6 pin
3pin male, pin 3 white/red is continuity with red 6 pin connector pin 6

3 pin female pin 3 white/green is continuity with red 6 pin connector pin 4

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Now plug in the red 6 pin connector to the evo unit and retest "male white-red" and "female white-green" for continuity.

the red connector is the relay connector, we open up a wire during remote starting which is the 12v power to the 3 pin immo connector.

When the evo is not activated, this cut is normally connected by the built in relay of the evo (red connector)

So in theory, with the t-harness connected and only the red connector connected to the evo-all the vehicle should start normally with the key.

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so im assuming this is a normally closed relay that without power should test good for continuity?

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Okay I have continuity there. Im going to try and reinstall it a third time. It just hangs up at the yellow light blinking 10x it just stays solid doing normal install method. I can always try dycriptor method and see if it works but I was never getting the red led flashing. Now when plugging it in one set of directions says to plug in the black 4 pin while holding the power but the install for without the t-harnes says to install the 20 pin connector first. what should I try?

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so im assuming this is a normally closed relay that without power should test good for continuity?

 Yes.

 

I would try the dcryptor programming, it will check if all connections are good without the chance that the vehicle is locked against new key programming.

 

Thank you,